Polyhedral Boranes as Superacids

1. What are polyhedral boranes?

A) Cluster compounds of boron and hydrogen
B) Chain compounds of boron
C) Ionic compounds of boron
D) Metallic compounds of boron

2. What role do polyhedral boranes play in organic synthesis?

A) They act as radical initiators
B) They are inert in organic reactions
C) They can be used as catalysts or reagents
D) They are only used as solvents

3. What is the most widely studied class of polyhedral boranes?

A) Boronates
B) Carboranes
C) Iodoboranes
D) Fluoroboranes

4. Which property contributes to the thermal stability of polyhedral boranes?

A) High reactivity with water
B) Lone pair availability on boron atoms
C) Presence of double bonds
D) The cage-like structure

5. Which element is typically found at the center of most polyhedral boranes?

A) Carbon
B) Boron
C) Nitrogen
D) Sulfur

6. What is the origin of the term 'carborane'?

A) Carbide and boron
B) Carbohydrate and boron
C) Carbon and boron
D) Carboxylic acid and boron

7. Which Nobel Prize-winning scientist contributed significantly to the study of boranes?

A) Albert Einstein
B) Nikola Tesla
C) Herbert C. Brown
D) Marie Curie

8. What role do fluorinated polyhedral boranes play in MRI contrast agents?

A) They reduce contrast in MRI imaging
B) They have no effect on MRI imaging
C) They cause interference in MRI imaging
D) They enhance contrast in MRI imaging

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